Perhaps you should try some spelling variations:
thanh trung » thanh tung
theo chieu » theo tieu, ho chieu, theo chu
hoc thieu » toc thieu
trung cau » trung cap, trung ca, trung can
dung cong » dung trong
cau dung » cau duong, cu dung, cau dong
cong tac » cong ty
tac tran » tan tran, tac trai, tac tren
tran huu » tran duc

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo chieu) or (((hoc thieu) OR (hoc hien)))) tinh - thanh trung cau dung cong tac tran huu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (((hoc thieu) OR (hoc hien)))) tinh - thanh trung cau dung cong tac tran huu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) or (((hoc thieu) OR (hoc hien)))) tinh - thanh trung cau dung cong tac tran huu".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (((hoc thieu) OR (hoc hien)))) tinh - thanh trung cau dung cong tac tran huu*.